Lewis Hamilton and Nicole Scherzinger split - again

Lewis Hamilton split with Nicole Scherzinger, his girlfriend of five years, a month ago “just weeks after he revealed plan to propose”, according to The Sun.

The hectic schedules of the two stars were reportedly the cause of the latest break up – the third in their on and off relationship.

"It’s so hard to keep up a relationship when they’re barely in the same country as each other," an unnamed source told The Sun. "The nature of their work ultimately cost their relationship.”

The pair had parted ways in 2010 and 2011 as well but was reunited a few months later on each occasion.

“Nicole is heartbroken about the split. She thought he was ‘the one’ but it didn’t work out,” another anonymous source told The Sun. “She and Lewis broke up around a month ago and have been keeping it quiet since then.

“Only a few close friends and family knew and they’ve been comforting both of them," the source added. "She is throwing herself into work to forget the pain of the break-up.”

Scherzinger, who occasionally attended races, was last seen in the Formula 1 paddock during the Canadian Grand Prix last month.